Retraction of statement

My wife physically assaulted me and I lodged a complaint against her. Also, MLC was done on me. As the police were not taking action, I approached NHRC. NHRC gave directions to the DCP to resolve my complaint within 08 weeks. In this regard, the concerned SI called me for recording my statement. However, he manipulated me into believing that it is a marital discord case and himself wrote the statement as "my name, s/o, local address, permanent address, state that I have a marital discord with my wife and my in-laws are threatening me with false case against me. The last date I attended in CAW Cell was 02.06.2017 and the next date is 16.06.2017. The above stated are true to my knowledge." My wife has given a written complaint against me in Crime Against Women Cell. Now, I realise that this statement will weaken the case against my wife. I now wish to change the statement indicating physical assault on me by my wife and desire that proper action should be taken against her. Please advise.